48 SOCIAL SCIENTIST 28 Reliable population estimates for the 19th century do not exist for the three regions. 1 he census figures 1881 and 1891 are considered to be undcpendable. For instance, see the discussion on the population figures for these years for Travancore by Nagam Aiya, Travancore State Manual Vol I» Supdt. Government Press, Trivandrum, 1906, pp 1-8. 29 Innes, op cit, p 249. 80 See Administration reports of Travancore for 1900-01, 1910-11 and 1930-31 and the Administration Reports of Cochin for 1920-21 and 1930-31. 81 This line, writes Innes, "runs through the Valluvanad and Brand Taluks, the main centres ofMoplah rebellion of 1921 and is of considerable political and administrative value".- C A Innes, Malabar, op cit., p. 272.